The European Crab, also known as Carcinus maenas, is a species of crab commonly found along the coasts of Europe and North America. It has a greenish-brown shell with a broad, oval shape and can grow up to 10 cm in width. This crab is known for its adaptability to various habitats, including rocky shores, estuaries, and salt marshes. European Crabs are omnivorous, feeding on a diet that includes algae, mollusks, and detritus. They play a significant role in their ecosystem by helping to control the population of other marine organisms. Due to their invasive nature in some regions, they can impact local biodiversity.